>>> Please apply the first patch (or a similar solution) to include
>>> ltdl.h directly. This is both how it's documented and how
>>> it will work with Libtool 1.5.x and 2.x: the latter has other
>>> included files, which live one directory level further down
>>
>> Done, thanks.
>
> I missed another instance of this (exposed by "make check"), sorry.
> See below.

Per our other thread, I've updated all of this -- please let me know if
you find any problems.